Around Caracas, the ________farmland of the valley floor, originally used for growing sugar cane and coffee, was soon absorbed by the expansion of the city.
句意：在加拉加斯，谷底的肥沃的农田，原本用于种植甘蔗和咖啡，很快就被城市的扩张所吸收。 fertile肥沃的。futile无效的。luxuriant华丽的，茂盛的。luxurious豪华的。因此答案选A。